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b012980d WD |
1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | ||
3 | #ifndef _ASM_RISCV_MMIOWB_H | |
4 | #define _ASM_RISCV_MMIOWB_H | |
5 | ||
6 | /* | |
7 | * "o,w" is sufficient to ensure that all writes to the device have completed | |
8 | * before the write to the spinlock is allowed to commit. | |
9 | */ | |
10 | #define mmiowb() __asm__ __volatile__ ("fence o,w" : : : "memory"); | |
11 | ||
12 | #include <asm-generic/mmiowb.h> | |
13 | ||
14 | #endif /* ASM_RISCV_MMIOWB_H */ |